نتایج جستجو برای: pest resistance
تعداد نتایج: 389934 فیلتر نتایج به سال:
Cropping sequence and length of rotation play an important role in potato production. Too often, growers are forced to base their cropping system decisions on short-term economic survival. Our market-based economy rewards economic efficiency and has helped push the trend to larger farms with lower production costs. Improving economic efficiency, with large, specialized potato equipment, means f...
Sorghum is one of the most important cereals in the semi-arid tropics. Nearly 150 insect specieshave been reported to damage the crop worldwide, causing an estimated loss of over US$ 1 000million annually. Of these, shoot fly, stem borers, greenbug, sugarcane aphid, shoot bug, spidermites, armyworms, midge, head bug, and head caterpillars are the major pests. Plant resistance to...
Table 1. Percentage of larvae surviving on cabbage cultivar Round Up and diamondback moth-resistant glossy-leafed cabbage NY 2518, and relative resistance of NY 2518 (survival on NY 2518 expressed as a percentage of that on ‘Round Up’) at five plant ages and two inoculation schemes. Knowledge of age-dependent expression of resistance is critical for evaluation of breeding lines and for effectiv...
Transgenic crops producing insecticidal proteins from the bacterium Bacillus thuringiensis (Bt) are extensively cultivated worldwide. To counter rapidly increasing pest resistance to crops that produce single Bt toxins, transgenic plant 'pyramids' producing two or more Bt toxins that kill the same pest have been widely adopted. However, cross-resistance and antagonism between Bt toxins limit th...
Insecticide management strategies for control of swede midge (Diptera: Cecidomyiidae) on cole crops.
Insecticide field trials were conducted in Ontario, Canada, and New York state to identify insecticides effective against the swede midge, Contarinia nasturtii Kieffer (Diptera: Cecidomyiidae), a new invasive pest in North America. Field trials indicated that foliar applications of lambda-cyhalothrin, permethrin, acetamiprid, chlorpyrifos, and dimethoate could provide control of C. nasturtii. F...
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