{"id":27915,"date":"2026-09-17T18:10:17","date_gmt":"2026-09-17T22:10:17","guid":{"rendered":"https:\/\/mmcereais.com.br\/2026\/feijao\/feijao-calor-seca-e-pragas-ameacam-formacao-de-vagens\/"},"modified":"2026-09-17T18:10:17","modified_gmt":"2026-09-17T22:10:17","slug":"feijao-calor-seca-e-pragas-ameacam-formacao-de-vagens","status":"publish","type":"post","link":"https:\/\/mmcereais.com.br\/en\/2026\/feijao\/feijao-calor-seca-e-pragas-ameacam-formacao-de-vagens\/","title":{"rendered":"Beans: Heat, drought, and pests threaten pod formation."},"content":{"rendered":"

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The management of bean<\/a> During the reproductive stage, attention must be paid to water, nutrition, and pest and disease control to reduce flower and pod abortion. According to information from the technical material presented, the period from the emergence of the first flower buds (R5) to the filling of the pods (R9) is crucial in determining the crop's productive potential.\n<\/p>\n

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At this stage, the bean plant directs resources towards flower production, pollination, fertilization, and the development of pods and grains. Since the plant naturally produces more flowers than it can sustain until the end of its cycle, some of the flower drop is physiological.<\/p>\n

The problem arises when abortion exceeds the expected rate. According to information from the technical material presented, stresses related to lack or excess of water, nutritional imbalances, extreme temperatures, diseases, pests, and weeds can increase the loss of reproductive structures.<\/p>\n

Water availability is among the main points of attention. The common bean plant is sensitive to variations in humidity during flowering and pod formation. Both drought and waterlogging can reduce photosynthesis and the transport of photoassimilates to the reproductive structures.<\/p>\n

Dry periods close to flowering are especially critical in rainfed areas. In irrigated areas, excess water should also be avoided, as large fluctuations between dry and wet periods can cause stress and promote abortion.<\/p>\n

Nutrition also directly affects flower setting and pod formation. According to information from the technical material presented, deficiencies in nitrogen, phosphorus, potassium, and micronutrients such as boron, zinc, and molybdenum can compromise reproductive development.<\/p>\n

Nitrogen is involved in vegetative development and the support of reproductive structures. Phosphorus is related to providing energy for fertilization and the initial development of pods, while potassium contributes to stomatal control, sugar transport, and stress resistance.<\/p>\n

Boron and zinc are identified as important for pollen viability, pollen tube formation, and the development of reproductive tissues. Molybdenum is also among the micronutrients that deserve attention in crop management.<\/p>\n

Extreme temperatures pose another risk during flowering. According to information in the technical material presented, daytime temperatures above 30\u00b0C to 32\u00b0C can reduce pollen viability and cause newly opened flowers to fall off.<\/p>\n

At the opposite extreme, temperatures close to 10\u00b0C to 12\u00b0C can also harm fertilization and the initial development of the pods. In different producing regions, periods of unseasonal heat or cold can coincide with flowering and increase abortion.\n<\/p>\n

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Diseases can also compromise the reproductive performance of the common bean. Pathogens that reduce green leaf area and photosynthesis, such as those associated with anthracnose, rust, and leaf spots, decrease the supply of photoassimilates to the flowers.<\/p>\n

Pod rot and diseases affecting the peduncles can also cause the direct loss of reproductive structures.<\/p>\n

Pests require monitoring during bud and flower formation and the development of the first pods. Stink bugs, thrips, and whiteflies can damage reproductive structures and cause physiological stress by sucking sap.<\/p>\n

Beetles and caterpillars can also destroy flowers and small pods. According to information from the technical material presented, the occurrence of pests above tolerable levels during flowering and pod formation is directly associated with an increase in pod drop.<\/p>\n

Competition with weeds can exacerbate the problem. By competing for water, light, and nutrients, weeds can reduce the leaf area and reserves of the bean plant before it enters the reproductive period.<\/p>\n

However, not all flower drop indicates a management failure. The bean plant naturally discards some of its flowers and small pods to adjust its yield to the plant's carrying capacity.<\/p>\n

Signs that flower abortion may be above normal include intense and continuous flower drop a few days after opening, poor pod formation on branches with high flower production, and the presence of many empty or very small pods.<\/p>\n

Plants that appear healthy but have a low number of pods per plant may also indicate problems related to nutrition, water, or temperature.<\/p>\n

Weekly monitoring helps differentiate between physiological abortion and abortion caused by stress. According to information in the technical material presented, records of rainfall, irrigation, temperature, fertilization, pests, and diseases can help identify the causes.<\/p>\n

Water management should begin with assessing soil moisture, considering texture, effective root depth, and rainfall and irrigation history. In irrigated areas, the recommendation is to maintain moisture close to field capacity during flower bud formation, flowering, and grain filling, avoiding waterlogging.<\/p>\n

The irrigation schedule should consider soil texture, evapotranspiration, and the crop's growth stage. Sandy soils, for example, require shorter intervals between irrigations. During flowering and pod filling, monitoring water availability becomes even more important.<\/p>\n

In rainfed areas, planning the sowing season can help reduce the risk of flowering coinciding with periods of drought. According to information in the technical material presented, the choice of season should consider the historical regularity of rainfall in the region.<\/p>\n

The nutritional strategy also begins before sowing. Soil analysis should guide acidity correction and planting fertilization, while crop monitoring allows for the identification of potential deficiencies during vegetative development.<\/p>\n

Topdressing and micronutrient applications close to flowering may be considered when there is a technical indication of deficiency. The material emphasizes that these decisions should take into account soil and foliar analyses and guidance from a qualified professional.\n<\/p>\n

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Nitrogen deserves special attention because both deficiency and excess can affect development. While a lack limits growth and the support of reproductive structures, an excess can stimulate vegetation at the expense of pod formation.<\/p>\n

Phosphorus is important for root development and the formation of flowers and fruits, while potassium contributes to stomatal control, carbohydrate transport, and drought resistance.<\/p>\n

Phytosanitary control should be integrated into management during the reproductive period. According to information from the technical material presented, the producer should monitor different points of the crop weekly and observe the upper leaves, buds, flowers, and pods.<\/p>\n

Preventive measures such as crop rotation, management of host weeds, use of healthy seeds, seed treatment, and sowing at the recommended time are also part of the strategy.<\/p>\n

The material advises that pesticides should be used when the infestation exceeds the action threshold or economic damage threshold, always in accordance with the product label, the agronomic prescription, and the instructions of the agricultural engineer.<\/p>\n

During flowering and pod filling, it is also important to avoid heavy mechanical operations that could cause physical damage to the plants and flowers. The use of selective herbicides and adherence to application rates and times help reduce the risk of late phytotoxicity.<\/p>\n

Bean management during the reproductive stage, therefore, depends on the integration of different practices. The choice of adapted cultivars, sowing planning, soil correction, balanced nutrition, weed control, and phytosanitary monitoring all contribute to preparing the crop before flowering.<\/p>\n

According to information from the technical material presented, adopting these practices throughout the entire cycle is important because the success in flower and pod setting depends not only on the measures taken during the reproductive stage.<\/p>\n

Continuous observation of the crop also allows for improved management. Records of flower drop, pod formation, and the occurrence of stresses can be related to soil conditions, climate, irrigation, and management, forming a useful history for future cycles.<\/p>\n

The material also recommends paying attention to safety during the use of fertilizers, growth regulators, and pesticides. Applications must respect doses, intervals, and withdrawal periods, as well as appropriate temperature and wind conditions.<\/p>\n

Guidance from an agricultural engineer is necessary for decisions related to product use, dosages, nutritional adjustments, and important changes in management.<\/p>\n

Therefore, reducing preventable flower and pod abortion in beans requires a strategy that combines adequate water availability, nutritional balance, phytosanitary control, and stress reduction. The goal is to preserve as many reproductive structures as possible and promote pod and grain formation.<\/p>\n<\/p><\/div>\n

THE MM Cereais<\/strong> works with the best grains on the market and also keeps you up to date with the latest news and analyses on agribusiness.
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O manejo do feij\u00e3o no est\u00e1dio reprodutivo exige aten\u00e7\u00e3o \u00e0 \u00e1gua, nutri\u00e7\u00e3o e controle de…<\/p>","protected":false},"author":1,"featured_media":27430,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[219],"tags":[244,248,255,249,254,250,246,247,256,245,253,252,251],"class_list":["post-27915","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-feijao","tag-agrolink","tag-agrotoxicos","tag-artigos-tecnicos","tag-classificados","tag-colunistas","tag-compra","tag-cotacoes","tag-defensivos","tag-eventos","tag-noticias","tag-precos-agricolas","tag-previsao-do-tempo","tag-venda"],"_links":{"self":[{"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/posts\/27915","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/comments?post=27915"}],"version-history":[{"count":0,"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/posts\/27915\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/media\/27430"}],"wp:attachment":[{"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/media?parent=27915"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/categories?post=27915"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mmcereais.com.br\/en\/wp-json\/wp\/v2\/tags?post=27915"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}