again. These lay the winter eggs. Damage symptoms Large raspberry aphids rarely reach populations that are high enough to reduce yield by direct…
overwintering. Damage symptoms Direct damage, caused by sucking of sap is rarely seen. Sometimes, large populations build up on potatoes or other…
because of its poor saprophytic competitiveness and because chlamydospores are rare. Primary infection is purely seed-borne. Conidia and other fungal…
greenhouse thrips is parthenogenic, it reproduces without mating, and males are rare. The adults are poor fliers and tend to remain in the shaded…
Africa, and Australia, woolly aphid does not infest roots in Europe (except rarely if they occur above the ground) or the subterranean basal part of…
taking the venom gland with it. How to prevent bumblebee stings? Bumblebees rarely sting. The chance of being stung by a bumblebee can be reduced by…
the upper and lower surface of leaves, preferentially in depressions, and rarely on stems or petioles. There are four larval instars. The body tapers…
bark beetles or other wood-boring insects. In mature forests, trees are rarely killed but significant losses occur in volume growth. Defoliation…
system is pneumatic and is controlled by a timer or the climate computer. On a rare occasion, when air pressure drops, the system is opened…
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